function runDate(){
    var time = new Date();//获取系统当前时间
    var year = time.getFullYear();
    var month = time.getMonth()+1;
    var date= time.getDate();//系统时间月份中的日
    var day = time.getDay();//系统时间中的星期值
    var weeks = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
    var week = weeks[day];//显示为星期几
    var hour = time.getHours();
    var minutes = time.getMinutes();
    var seconds = time.getSeconds();
    if(month<10){
        month = "0"+month;
    }
    if(date<10){
        date = "0"+date;
    }
    if(hour<10){
        hour = "0"+hour;
    }
    if(minutes<10){
        minutes = "0"+minutes;
    }
    if(seconds<10){
        seconds = "0"+seconds;
    }
    //var newDate = year+"年"+month+"月"+date+"日"+week+hour+":"+minutes+":"+seconds;
    document.getElementById("clock").innerHTML = year+"-"+month+"-"+date+" "+hour+":"+minutes+":"+seconds;
    setTimeout('runDate()',1000);
}
runDate();